Kaufman, Darrell S; Polyak, Leonid; Adler, Ruth E; Channell, James E T; Xuan, Chuang (2008): Amino acid racemization of Neogloboquadrina pachyderma from the Arctic Ocean [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.832121, Supplement to: Kaufman, DS et al. (2008): Dating late Quaternary planktonic foraminifer Neogloboquadrina pachyderma from the Arctic Ocean using amino acid racemization. Paleoceanography, 23(3), PA3224, https://doi.org/10.1029/2008PA001618
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Abstract:
The long-term rate of racemization for amino acids preserved in planktonic foraminifera was determined by using independently dated sediment cores from the Arctic Ocean. The racemization rates for aspartic acid (Asp) and glutamic acid (Glu) in the common taxon, Neogloboquadrina pachyderma, were calibrated for the last 150 ka using 14C ages and the emerging Quaternary chronostratigraphy of Arctic Ocean sediments. An analysis of errors indicates realistic age uncertainties of about ±12% for Asp and ±17% for Glu. Fifty individual tests are sufficient to analyze multiple subsamples, identify outliers, and derive robust sample mean values. The new age equation can be applied to verify and refine age models for sediment cores elsewhere in the Arctic Ocean, a critical region for understanding the dynamics of global climate change.
Coverage:
Median Latitude: 80.932147 * Median Longitude: 178.454656 * South-bound Latitude: 74.622500 * West-bound Longitude: 144.770330 * North-bound Latitude: 87.091830 * East-bound Longitude: -157.884000
Date/Time Start: 1996-08-14T00:00:00 * Date/Time End: 2005-08-25T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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3 datasets
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Datasets listed in this publication series
- Kaufman, DS; Polyak, L; Adler, RE et al. (2008): (Table 2) Age determination of Arctic Ocean sediment cores. https://doi.org/10.1594/PANGAEA.832119
- Kaufman, DS; Polyak, L; Adler, RE et al. (2008): (Table S1) Amino acids in Neogloboquadrina pachyderma from the Artcic Ocean. https://doi.org/10.1594/PANGAEA.832118
- Kaufman, DS; Polyak, L; Adler, RE et al. (2008): (Table 3) Extent of racemization (D/L) in foraminifera from Arctic Ocean sediment cores. https://doi.org/10.1594/PANGAEA.832120